Head-motion for concentrating-tables.



V s. H. BOYLAN. HEAD MOTION FOR OONGENTRATING TABLES.

APPLICATION FILED MAY 13, 1907. RENEWED HA3. 7, 190B.

901,585; Patented 0ct.20,1908.

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s. H. BOYLAN. HEAD MOTION FOR GONGENTRATING TABLES.

APPLICATION FILED MAY 13, 1907. RENEWED HARRY, 1908.

901,585. Patented 0011.20, 1908.

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HEAD MOTION FOR GONGENTRATING TABLES. APPLICATION FILED MAY 13, 1907.RENEWED Mn. 7, 1905.

901,585, Patented 0012.20, 1908.

a following to be a full, clear, and exact de able others skilled in theart to which it v SAMUEL n. BOYLAN, or DENVER, COLORADO.

-. HEAD-MOTiON Fox coNoEuraArme-rums.

Specification of Letters Patent. I l

Patented 0011.20, 1908.;

' mesa... filed May is, 1907, Serial No. 373,403. ene a March 7, 1903.Serial no. 419,170. I v

To all whom it may bncern: r Be it known that I, SAMUEL H. BOYLAN, allzitizen of the United city and county of Denver and State of Colorado,have invented.certainQnew and "useful llmprovements in Head-Motions forConcentrating-Tahlest' and I do declare the scription of the invention,such as will enappertains to make and use the same, referencebeing hadto the accompanying drawings, and to the letters and figures ofreference marked thereon, which form a part of this specification.

My invention relates .to improvements in mechanism adapted to impart apeculiar form of reciprocating movement to concentrators or otherapparatus requiring such action. I

The invention is moreespecially adapted for use with concentratingtables where great accuracy of adjustment is required in order to getthe proper character and length of stroke, for separating metal valuesfrom the gangue.

The object of my present invention is to provide an improved mechanismof this character whereby the requisite accuracy of adjustment ma beobtained both for the purpose of regu ating the character or speed ofthe stroke in both directions, as well as for regulating the lengththereof, all of which W1 accompanying drawing in which is illustrated anembodiment thereof.

In this drawing, Figure l is a side elevation of my improved head motionshown in connection with a concentrating apparatus which is partlybroken away. Fi vertical longitudinal section 'taken through themechanism. The plane of this section is indicated by the line 2-2 Fig.3. v Fig. 3 is a top plan view of my improved head motion withoutshowing the cencentrating table. Fig. 4 shows a number of blocks'usedfor regulating the vertical adjustment of the outer extremity of one ofthe toggle members. Figs. 5 and 6 are side and top plan views,respectively of the intermediate frame member. Figs. 7 and 8 are frontand side views respectively, ofthe lever or rocker arm. Fig. 9 is across section taken on the line 9--9 Fig. 2.

The same reference characters indicate the same parts in all the views.

States, residing in the Let the numeral 5 desi mate a suitable base i 0fthe mechanism are mounted. Pro ecting outwardly from each frame member6, are journal boxes 13 each of which is provided with a movable member161 heldin suitable relation with the journals of the crank shaft 15 bymeans of bolts 16 threaded in parts 17 of the journal boxes. The shaft15 is pro vided with a crank centrally located between the side membersof the frame and with which is connected a hanger-l8. A part of thebearing for the crank is formed in the body of the hanger, while anupper box member 19 is connected with the lower bearing by means ofbolts 20. The lower part of this hanger is equipped with bearing blocks21 which are engaged by the inner extremities of two toggle members 22and 1 be fully understood byreference to the g. 2 is a 23. The outerextremity of the toggle member 23, engages a bearing 24 located in ablock 25 adjustably mounted in a holder 26 by means of a screw 27. Thisholder 26 is held in place by means of cap screws 29 horizontallydisposed, and passed through the side members 6 of the frame and alsothrough the upwardly projecting angle parts 30 of the upwardlyprojecting part 12 of the bed plate.

The forward extremity of the toggle member 22, is seated in a block 31carried by a lever 32 fulcrumed on trunnions '33. The block 31 iscarried by the lower arm of this lever, while the upper arm of the levercarries a pin 34 engaged by a bearing composed of members35 and 36connected by bolts 37. With the member 35 is connected a rod 38 whoseforward extremity is connected with means of a rod 45.

The trunnions 33 of the lever or rocker arm 32, engage seats 46 formedin the side frame member 6 and are also engaged by bearing blocks 47grooved atthe top and bottom to engage retaining plates 48 formedintegral with the side members 6 to prevent lateral displacement.- Theseblocks are also held in place from in 'front bymeans of keys 49.. Thekeys 49 are wedge-shaped and when properly adjusted vertically, are heldin place by cap screws D engaging threaded openings formed in the framemember 6. The lower arm of the lever 32 is notched on its front side asshown at 50 to engage a pointed projection 51 formed on a plate 52provided with a socket 53 which receives one extremity of a coil spring54-, whose opposite extremity enga es a seat 55 formed in the centralpart of a transverse bar 56 whose opposite extremities are connectedbymeans of rods 57, with the respective side frame members 6. Thesemembers- 6 are provided with exterior-ly located vertically disposedribs'58 through which the rods 57 pass, the said rods being held inplace by means of nuts 59, which may be utilized to regulate the tensionof the spring 54..

The pin 3Lis vertically adjustable in an elongated opening .60 formed inthe upper arm of the lever 32. By the vertical adjustment of this pinand the corresponding vertical adjustment of the yoke 39 on the member42, the length of stroke imparted to the concentrator 61 may beregulated at will.

By forminga number of notches 50 in the lower arm of the lever 32, itbecomes practicable to use springs of different character. If theprojection 51 engages the uppermost notch 50, comparatively littlecompression is given to the spring. This adjustment is made when astrong or stiff spring is employed. When a springof less strength andusually of greater length is used, the projection engages a lower notchwhereby greater compression is given. This is an important feature in adevice of this character.

The vertical adjustment of the outer or forward extremity of thetogglemember 22, is effected by using a number of bearing blocks 31,having their recesses 31' formed at different elevations. This isequivalent to the vertical adjustment of a single bearing block. Myimproved lever, however, is so constructed that an adjusting boltmanipulated from the top cannot be as conveniently employed. For thisreason I resort'to the construction just explained. All the bearingblocks heretofore described, are provided with recesses B adapted tohold oil or other lubricant which is allowed to flow to the engagingtoggle'member extremities.

From the foregoing description the; use and operation of my improvedmechanism will be readily understood. Assumingthat the parts areassembled as shown in the vice to be vibrated sudden y rearwardly.

the crank moves the hanger downwardly, the reverse action occurs, thatis to say the spring Macting on the lower arm of the lever 32 throughthe medium of the projection 51, throws the said arm rearwardly, andimparts a forward movement to the upper arm of the same lever, thusgiving the forward vibratory stroke to the concentrator. It is importautthat the action of the spring be utilized to give the forward stroke tothe concentrator since its action is slower than the action in)- pa'rtedby the toggle members; and from the nature of the concentrator function,it is im portant that the return movement or the backward stroke of theconcentrator should be quick, while the forward stroke should be slower.By virtue of this construction, the proper character of vibration isgiven to the concentrator for the separation of the metallic values fromthe angne, and causing the concentrates to trave continuously forwardlyor toward the concentrates discharge end of the table being that remotefrom the head motion.

The holder 26 carrying the bearing for the rear extremity of the toggle23, is engaged in the rear by cap screws C which are threaded in thepart 12 and bear against the rear extremity of the device 26.

The necessity for the accuracy of the adjustment heretofore referred to,in head motions for concentrating tables, is due to the fact that thesetables niust be used to treat a great variety of ores inlwhich differentmetals predominate. Owirt'g to the fact that the different metal valuesas well as the. different varieties of gangue, have different specificgravities, it is essential that the head motion be differently adjustedfor every variety of ore under treatment. Hence the necessity for i thevarious adjustments heretofore explained, that is to say? theadjustmentsof the toggle members for imparting a quick return or rearward movementto the concentrator, while the spring imparts a more slow forward movement thereto. Itds very important that the mechanism be so arranged thatthe toggle members be utilized to impart the return or rearward movementand the spring the forward movement. It is found in actual practice thatwhere it is attempted to utillze a spring to impart a su ciently quickreturn movement, a spring of such strength is re quired that it becomesimpracticable to operate the mechanism in this way.

Having thus described my invention, what I claim is: v

1. In mechanism of the class described, the combination with aconcentrating table mounted to have a reciprocating movement, of a crankshaft, a hanger connected with the crank of the shaft, toggle membersengaging the hanger, vertically adjustable tog gle seats for the outerextremities of both toggle members,a lever upon one arm of which one ofsaid seats is mounted, a vertically adjustable connection between theother arm, of the lever and the concentrating table, and a springactuating device engaging a vertical series of recesses formed in thelower arm, to act on said lever to move the said table in one direction,the toggle members being utilized to move it in the opposite direction,sul'istantially as described.

2. In a head motion for concentrators, the combination with aconcentrator and a suitable frame work, of a crank shaft journaled 1nthe frame work,- a hanger mounted on thethe lever arm, for the purposeset forth.

3. In a head motion for concentrators, the combination with aconcentrator and a head motion frame work, of a crank shaft, a hangerconnected to be actuated by therrank of said shaft, a lever fulcrumed onthe frame work, a toggle member interposed between the said' hanger andthe lower arm of the said lever, a second toggle member having oneextremity engaging the hanger on the opposite side from the first togglemember, a toggle seat for the opposite extremity of'the second togglemember, means for the vertical adjustment of the toggle memberextremities remote from the hanger, a vertically adjustable connectionbetween the upper arm of the said lever and the concentrator, and aspring-actuated device for engaging the lower arm of the lever on theopposite side from the first toggle member, the lower arm of the leverbeing provided with a vertical series of recesses, adapted to receivethe spring-actuated device for the purpose set forth.

4. In a head motion for concentrators, the

lever being provided with a vertical slot, a

pin passing through said slot and vertically adjustable therein, a rodconnecting said pin with the concentrator, the concentrator end of therod being vertically adjustable to hermonize with the adjustment of thesaid pin, and a spring-actuated device engaging a vertical series ofrecesses arranged in the lower arm of the lever on the opposite sidefrom the first named toggle member, substantially as described.

The combination with a structure to be vibrated, of a head motiontherefor comprising a suitable frame Work, a crank shaft journaled inthe framework, a hanger actuated thereby, a lever fulcrumed in the frameWork, toggle members engaging the hanger on opposite sides, one of thesaid members engaging the lower arm of the lever while the other memberengages the frame work,- a vertically adjustable connection between theupper extremity of the said lever andthe de vice to be vibrated, a crossbar, rods connecting the opposite extremities of the cross bar with theframe, a coil spring having one extremity engaging the cross barintermediate its extremities, a seat for the opposite. extremity of thesaid spring, the said seat having a rearward projection adapted toengage the lower arm of the lever which is provided with a verticalseriesof recesses therefor, substantially as described.

In testimony whereof I afiix my s1gnature in presence of two witnesses.

SAMUEL' BOYLAN.

A. J OBRI'EN.

